Fastening for door-knobs.



No. 876,845. PATENTED JAN. 14, 1908.

' J. F. SMART. FASTENING FOR DOOR KNOBS. APPLICATION FILED MAY 2,1907. Ti

WITNESS/53 JOSEPH F. SMART, OF STAMFORD, CONNECTICUT.

FASTENING FOR DOOR-KN OBS.

Specification of Letters Patent.

Patented Jan. 14, 1908.

Application filed May 2. 1907. Serial No. 371.391.

T all whom it may concern:

Be it known that I, JosEPH F. SMART, a citizen of the United States, and a resident of Stamford, in the county of Fairfield and State of Connecticut, have invented a new and Improved Fastening for Door-Knobs, of which the following is a full, clear, and eXact description.

This invention relates to fasteners, and is intended to be especially useful in fastening door knobs upon a door.

The object of the invention is to produce a fastener of this kind which is constructed of few parts, adapted to be assembled in a simple manner and without necessitatingv the employment of set screws or similar fasteners. In practice, such set screws are likely to work loose so that the knobs become disconnected from the door.

The invention consists in the construction and combination of parts to be more fully described hereinafter and particularly setforth in the claims.

Reference is to be had to the accompanying drawing forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a vertical central section' through a pair of door knobs which are attached by means of the invention; Fig. 2 1s a cross section on the line 2-2 of Fig. 1;'

Fig. 3 is a longitudinal section on the line 33 of Fig. 2, and passing through the axis of the knob at the outside of the door; this view illustrates the manner in which the outer knob is secured in position; Fig. 4 is a view similar to Fig. 3, but representing the outer knob in the act of being applied and locked in position; this view is a vertical section on the line 14 of Fig. 5 Fig. 5 is a view similar to Fig. 2 but representing the cross section on the line 55 of Fig. 4, the parts being in the relation which they assume when the knob is about to be secured in position; Fig. 6 is a cross section on the line 6'6 of Fig. 3; and Fig. 7 is a longitudinal section similar to Fig. 3 but representing a modified construction; this view is upon a reduced scale.

Referring more particularly to the parts, 1 represents the edge of a door to which the knobs 2 and 3 are fastened according to my invention. The knob 2 is placed on the inside of the door and the knob 3 on the outside.

-' These knobs may be hollow, as shown, and provided with tubular shanks 4 and 5 respectively. These shanks seat against recesses 6 and 7 which are formed in the face-plates or escutcheons 8 and 9, as shown. Through the door passes the usual square spindle 10, and it should be understood that this spindle passes through the door-latch or look in the usual manner, so that by rotating thespindle the door may be unlatched when desired. The face-plates 8 and 9 are provided with suitable openings 11 through which the spindle 10 passes, as illustrated.

The manner of securing the knobs upon the spindle will now be described.

As illustrated, the spindle is of suflicient length to extend completely through the tubular shanks of the knobs. On the spindle, within each of the tubular shanks, I provide a pair of collars 12. These collars are formed with centrally disposed square openings, which prevent them from rotating on the spindle. Between each pair of collars I pro vide a circular hub 13, and this'circular hub is provided likewise with a square opening 14, which. prevents its rotating on the spindle. On each of these hubs 13 I provide an eccentrically-mounted locking-ring 15. In one of its positions this ring will be concentrically disposed with respect to the collars 12. When in this position the knobs are pushed onto the rojecting ends of the shanks so that the colars 12 and the locking-rings pass into the tubular shanks. The outer surfaces of the locking-rings or eccentric rings 15 are knurled, as shown, so that if the knobs are rotated in different directions, the eccentric rings will be rotated into an eccentric position so as to jam the parts within the shanks. In this way the two knobs become securely looked upon the spindle.

I provide an arrangement on the outer knob 3 for preventing the removal of this knob by applying a rotative force, for it will be surmised that a reverse movement from that just described will detach the knob from the spindle. For this purpose I provide the inner end of the tubular shank 5 with a notch 16, and within the mouth of the shank at this notch I provide a keeper 17, which is in the form of a collar having a square opening 18 received over the spindle. This collar is provided at its periphery with an outward projection or nib 19.

In assembling the parts provided with this improvement, the outer knob will be attached to the shank before the spindle is placed in the door. The shank will be held I come opposite to the projection 19.

rigidly While the knob is applied, as described above, the arrangement being such that when the knob 3 is jammed, the notch 16 will T e keeper 17 will then be slid longitudinally into the shank so as to lock the knob against any possible rotation on the spindle.

In order to facilitate the assembling of the parts as described, marks may be placed upon the faces of the collars or eccentric rings to indicate the position in which the rings will be placed when these parts are thrust into the tubular shanks. After the outer knob has been attached to the spindle in the manner described, the spindle is passed through the door and the inner knob is slid over the end of the spindle, so that the inner end of its tubular shank seats in either of the recesses 6 and 7. It will then be rotated on the spindle and will lock itself, as will be readily understood. In this way the knobs are looked upon the spindle close to the door and no lateral play is permitted which would admit of the keeper 17 becoming disengaged from the notch 16. In this way the knobs are securely fastened to'the door and cannot be detached by a person at the outer side of the door;

The manner of assembling the parts in placing the outer knob in position is clearly illustrated in Figs. 3 and 4. In some cases it may be desirable to employ a round spindle instead of a square spindle, in which case I provide the construction illustrated in Fig. 7. In this instance, the knob is provided with a tubular shank 20, as before, and the spindle 21 is provided with a longitudinally-disposed groove 22. A pair of collars 23 is provided, which are of circular form, and these collars are adapted to slide upon the spindle, as will be readily understood. The openings through them are provided with projections 24 respectively, which are received in the groove 22 and prevent the'rotation of the collars upon the spindle. Between the collars an eccentric ringor locking ring 25 is placed," and this ring simply has an eccentrically placed opening 26 through which the spindle passes, as shown. From this arrangement, it should be understood that the look ing collar 25 is rotatable, and when the parts are thrust into the tubular shank, the rota- -tion of the knob will rotate this collar, and

jam the parts in the manner described above. The means for locking this knob against detachment from the outside is substantially the same as that described in connection with the preferred form; that is, I provide a keeper 27, in the form of a collar, and this collar has a projection or tongue 28 which extends into the groove 22 and prevents the keeper from being rotated. The outer edge of the keeper is provided with a projection 29 which extends into a notch 30 formed in the end of the tubular shank, as indicated. When the knob has been jammed upon the spindle and the collars as described, the keeper 27 is slid longitudinally until the projection 29' engages the notch, whereupon it is evident that it will lock the knob against a reverse movement.

Having thus described my invention, I

claim as new and desire to secure by Letters mounted on said spindle between said collars,

an eccentric ring rotatably mounted on said hub between said collars and adapted to assume a position concentric with said collars, and a member having a tubular shank ada ted to slide over said collars and affording means for jammin said parts by a rotation of said eccentric collar on said hub.

' 3. In a fastening, in combination, a spindle, a pair of collars non-rotatably mounted on said spindle, an eccentrically disposed locking ring mounted between said collars on said spindle and which may assume a position concentric with said collars, a member having a tubular shank received over said collars and ada ted to rotate said locking collar and jam t e same within said tubular shank, and a slidable collar non-rotatably mounted on said spindle and having means for engaging said tubular shank to prevent a reverse rotation of said member.

4. In a fastening device, in combination, a spindle of angular form, collars having angular openings non-rotatably mounted on said spindle, a hub having an angular openin and mounted on said spindle between said co lars, an eccentric ring rotatably mounted on said hub and adapted to assume a position concentric with said collars, and a member having a tubular shank received over said collars and adapted to rotate said eccentric ring to jam said shank upon said collars and said run 5 In combination, a spindle adapted to be passed through a door, collars non-rotatably mounted on said spindle near the ends thereof, eccentric rings rotatably mounted on said spindle between said collars, and knobs having tubular shanks received over said collars and adapted to j am said eccentric rings within said shanks by a, rotation of said knobs.

6. In combination, a spindle adapted to be passed through a door, collars non-rotatably 1 mounted on said spindle near the ends thereof, eccentric rings rotatably mounted on said spindle between said collars, knobs havin tubular shanks received over said collars an adapted to jam said eccentric rings Within said shanks by a rotation of said knobs, and means for locking one of said knobs against a reverse movement. 7. In combination, a spindle adapted to be passed through a door, collars non-rotatably mounted on said spindle near the ends thereof, eccentric rings rotatably mounted on said spindle between said collars, knobs having tubular shanks received over said collars and adapted to jam said eccentric rings Within said shanks by a rotation of said knobs, a keeper slidably mounted on said spindle adj acent to one of said tubular necks and nonrotatable upon said spindle, and means whereby said keeper may engage said last shank to lock the same against a reverse rotation on said spindle.

In testimony whereof I have signed my name to this specification in the presence of tWo subscribing Witnesses.

JOSEPH F. SMART.

Witnesses:

A. W. BUMsTEAD, FRANK A. REILLY. 

